arch/microblaze/include/asm/page.h - kernel/bruno - Git at Google

 /*
  * VM ops
  *
  * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
  * Copyright (C) 2008-2009 PetaLogix
  * Copyright (C) 2006 Atmark Techno, Inc.
  * Changes for MMU support:
  *    Copyright (C) 2007 Xilinx, Inc.  All rights reserved.
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License. See the file "COPYING" in the main directory of this archive
  * for more details.
  */

 #ifndef _ASM_MICROBLAZE_PAGE_H
 #define _ASM_MICROBLAZE_PAGE_H

 #include <linux/pfn.h>
 #include <asm/setup.h>
 #include <asm/asm-compat.h>
 #include <linux/const.h>

 #ifdef __KERNEL__

 /* PAGE_SHIFT determines the page size */
 #if defined(CONFIG_MICROBLAZE_64K_PAGES)
 #define PAGE_SHIFT		16
 #elif defined(CONFIG_MICROBLAZE_16K_PAGES)
 #define PAGE_SHIFT		14
 #else
 #define PAGE_SHIFT		12
 #endif
 #define PAGE_SIZE	(ASM_CONST(1) << PAGE_SHIFT)
 #define PAGE_MASK	(~(PAGE_SIZE-1))

 #define LOAD_OFFSET	ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))

 #define PTE_SHIFT	(PAGE_SHIFT - 2)	/* 1024 ptes per page */

 #ifndef __ASSEMBLY__

 /* MS be sure that SLAB allocates aligned objects */
 #define ARCH_DMA_MINALIGN	L1_CACHE_BYTES

 #define ARCH_SLAB_MINALIGN	L1_CACHE_BYTES

 #define PAGE_UP(addr)	(((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
 #define PAGE_DOWN(addr)	((addr)&(~((PAGE_SIZE)-1)))

 #ifndef CONFIG_MMU
 /*
  * PAGE_OFFSET -- the first address of the first page of memory. When not
  * using MMU this corresponds to the first free page in physical memory (aligned
  * on a page boundary).
  */
 extern unsigned int __page_offset;
 #define PAGE_OFFSET __page_offset

 #else /* CONFIG_MMU */

 /*
  * PAGE_OFFSET -- the first address of the first page of memory. With MMU
  * it is set to the kernel start address (aligned on a page boundary).
  *
  * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used
  * in arch/microblaze/Makefile.
  */
 #define PAGE_OFFSET	CONFIG_KERNEL_START

 /*
  * The basic type of a PTE - 32 bit physical addressing.
  */
 typedef unsigned long pte_basic_t;
 #define PTE_FMT		"%.8lx"

 #endif /* CONFIG_MMU */

 # define copy_page(to, from)			memcpy((to), (from), PAGE_SIZE)
 # define clear_page(pgaddr)			memset((pgaddr), 0, PAGE_SIZE)

 # define clear_user_page(pgaddr, vaddr, page)	memset((pgaddr), 0, PAGE_SIZE)
 # define copy_user_page(vto, vfrom, vaddr, topg) \
 			memcpy((vto), (vfrom), PAGE_SIZE)

 /*
  * These are used to make use of C type-checking..
  */
 typedef struct page *pgtable_t;
 typedef struct { unsigned long	pte; }		pte_t;
 typedef struct { unsigned long	pgprot; }	pgprot_t;
 /* FIXME this can depend on linux kernel version */
 #   ifdef CONFIG_MMU
 typedef struct { unsigned long pmd; } pmd_t;
 typedef struct { unsigned long pgd; } pgd_t;
 #   else /* CONFIG_MMU */
 typedef struct { unsigned long	ste[64]; }	pmd_t;
 typedef struct { pmd_t		pue[1]; }	pud_t;
 typedef struct { pud_t		pge[1]; }	pgd_t;
 #   endif /* CONFIG_MMU */

 # define pte_val(x)	((x).pte)
 # define pgprot_val(x)	((x).pgprot)

 #   ifdef CONFIG_MMU
 #   define pmd_val(x)      ((x).pmd)
 #   define pgd_val(x)      ((x).pgd)
 #   else  /* CONFIG_MMU */
 #   define pmd_val(x)	((x).ste[0])
 #   define pud_val(x)	((x).pue[0])
 #   define pgd_val(x)	((x).pge[0])
 #   endif  /* CONFIG_MMU */

 # define __pte(x)	((pte_t) { (x) })
 # define __pmd(x)	((pmd_t) { (x) })
 # define __pgd(x)	((pgd_t) { (x) })
 # define __pgprot(x)	((pgprot_t) { (x) })

 /**
  * Conversions for virtual address, physical address, pfn, and struct
  * page are defined in the following files.
  *
  * virt -+
  *	 | asm-microblaze/page.h
  * phys -+
  *	 | linux/pfn.h
  *  pfn -+
  *	 | asm-generic/memory_model.h
  * page -+
  *
  */

 extern unsigned long max_low_pfn;
 extern unsigned long min_low_pfn;
 extern unsigned long max_pfn;

 extern unsigned long memory_start;
 extern unsigned long memory_size;
 extern unsigned long lowmem_size;

 extern unsigned long kernel_tlb;

 extern int page_is_ram(unsigned long pfn);

 # define phys_to_pfn(phys)	(PFN_DOWN(phys))
 # define pfn_to_phys(pfn)	(PFN_PHYS(pfn))

 # define virt_to_pfn(vaddr)	(phys_to_pfn((__pa(vaddr))))
 # define pfn_to_virt(pfn)	__va(pfn_to_phys((pfn)))

 #  ifdef CONFIG_MMU

 #  define virt_to_page(kaddr)	(pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
 #  define page_to_virt(page)   __va(page_to_pfn(page) << PAGE_SHIFT)
 #  define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)

 #  else /* CONFIG_MMU */
 #  define virt_to_page(vaddr)	(pfn_to_page(virt_to_pfn(vaddr)))
 #  define page_to_virt(page)	(pfn_to_virt(page_to_pfn(page)))
 #  define page_to_phys(page)	(pfn_to_phys(page_to_pfn(page)))
 #  define page_to_bus(page)	(page_to_phys(page))
 #  define phys_to_page(paddr)	(pfn_to_page(phys_to_pfn(paddr)))
 #  endif /* CONFIG_MMU */

 #  ifndef CONFIG_MMU
 #  define pfn_valid(pfn)	(((pfn) >= min_low_pfn) && \
 				((pfn) <= (min_low_pfn + max_mapnr)))
 #  define ARCH_PFN_OFFSET	(PAGE_OFFSET >> PAGE_SHIFT)
 #  else /* CONFIG_MMU */
 #  define ARCH_PFN_OFFSET	(memory_start >> PAGE_SHIFT)
 #  define pfn_valid(pfn)	((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
 #  endif /* CONFIG_MMU */

 # endif /* __ASSEMBLY__ */

 #define	virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))

 # define __pa(x)	__virt_to_phys((unsigned long)(x))
 # define __va(x)	((void *)__phys_to_virt((unsigned long)(x)))

 /* Convert between virtual and physical address for MMU. */
 /* Handle MicroBlaze processor with virtual memory. */
 #ifndef CONFIG_MMU
 #define __virt_to_phys(addr)	addr
 #define __phys_to_virt(addr)	addr
 #define tophys(rd, rs)	addik rd, rs, 0
 #define tovirt(rd, rs)	addik rd, rs, 0
 #else
 #define __virt_to_phys(addr) \
 	((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
 #define __phys_to_virt(addr) \
 	((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
 #define tophys(rd, rs) \
 	addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
 #define tovirt(rd, rs) \
 	addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
 #endif /* CONFIG_MMU */

 #define TOPHYS(addr)  __virt_to_phys(addr)

 #ifdef CONFIG_MMU

 #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
 				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 #endif /* CONFIG_MMU */

 #endif /* __KERNEL__ */

 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>

 #endif /* _ASM_MICROBLAZE_PAGE_H */
	/*
	* VM ops
	*
	* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
	* Copyright (C) 2008-2009 PetaLogix
	* Copyright (C) 2006 Atmark Techno, Inc.
	* Changes for MMU support:
	* Copyright (C) 2007 Xilinx, Inc. All rights reserved.
	*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*/

	#ifndef _ASM_MICROBLAZE_PAGE_H
	#define _ASM_MICROBLAZE_PAGE_H

	#include <linux/pfn.h>
	#include <asm/setup.h>
	#include <asm/asm-compat.h>
	#include <linux/const.h>

	#ifdef __KERNEL__

	/* PAGE_SHIFT determines the page size */
	#if defined(CONFIG_MICROBLAZE_64K_PAGES)
	#define PAGE_SHIFT 16
	#elif defined(CONFIG_MICROBLAZE_16K_PAGES)
	#define PAGE_SHIFT 14
	#else
	#define PAGE_SHIFT 12
	#endif
	#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
	#define PAGE_MASK (~(PAGE_SIZE-1))

	#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))

	#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */

	#ifndef __ASSEMBLY__

	/* MS be sure that SLAB allocates aligned objects */
	#define ARCH_DMA_MINALIGN L1_CACHE_BYTES

	#define ARCH_SLAB_MINALIGN L1_CACHE_BYTES

	#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
	#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))

	#ifndef CONFIG_MMU
	/*
	* PAGE_OFFSET -- the first address of the first page of memory. When not
	* using MMU this corresponds to the first free page in physical memory (aligned
	* on a page boundary).
	*/
	extern unsigned int __page_offset;
	#define PAGE_OFFSET __page_offset

	#else /* CONFIG_MMU */

	/*
	* PAGE_OFFSET -- the first address of the first page of memory. With MMU
	* it is set to the kernel start address (aligned on a page boundary).
	*
	* CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used
	* in arch/microblaze/Makefile.
	*/
	#define PAGE_OFFSET CONFIG_KERNEL_START

	/*
	* The basic type of a PTE - 32 bit physical addressing.
	*/
	typedef unsigned long pte_basic_t;
	#define PTE_FMT "%.8lx"

	#endif /* CONFIG_MMU */

	# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
	# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)

	# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
	# define copy_user_page(vto, vfrom, vaddr, topg) \
	memcpy((vto), (vfrom), PAGE_SIZE)

	/*
	* These are used to make use of C type-checking..
	*/
	typedef struct page *pgtable_t;
	typedef struct { unsigned long pte; } pte_t;
	typedef struct { unsigned long pgprot; } pgprot_t;
	/* FIXME this can depend on linux kernel version */
	# ifdef CONFIG_MMU
	typedef struct { unsigned long pmd; } pmd_t;
	typedef struct { unsigned long pgd; } pgd_t;
	# else /* CONFIG_MMU */
	typedef struct { unsigned long ste[64]; } pmd_t;
	typedef struct { pmd_t pue[1]; } pud_t;
	typedef struct { pud_t pge[1]; } pgd_t;
	# endif /* CONFIG_MMU */

	# define pte_val(x) ((x).pte)
	# define pgprot_val(x) ((x).pgprot)

	# ifdef CONFIG_MMU
	# define pmd_val(x) ((x).pmd)
	# define pgd_val(x) ((x).pgd)
	# else /* CONFIG_MMU */
	# define pmd_val(x) ((x).ste[0])
	# define pud_val(x) ((x).pue[0])
	# define pgd_val(x) ((x).pge[0])
	# endif /* CONFIG_MMU */

	# define __pte(x) ((pte_t) { (x) })
	# define __pmd(x) ((pmd_t) { (x) })
	# define __pgd(x) ((pgd_t) { (x) })
	# define __pgprot(x) ((pgprot_t) { (x) })

	/**
	* Conversions for virtual address, physical address, pfn, and struct
	* page are defined in the following files.
	*
	* virt -+
	* \| asm-microblaze/page.h
	* phys -+
	* \| linux/pfn.h
	* pfn -+
	* \| asm-generic/memory_model.h
	* page -+
	*
	*/

	extern unsigned long max_low_pfn;
	extern unsigned long min_low_pfn;
	extern unsigned long max_pfn;

	extern unsigned long memory_start;
	extern unsigned long memory_size;
	extern unsigned long lowmem_size;

	extern unsigned long kernel_tlb;

	extern int page_is_ram(unsigned long pfn);

	# define phys_to_pfn(phys) (PFN_DOWN(phys))
	# define pfn_to_phys(pfn) (PFN_PHYS(pfn))

	# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
	# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))

	# ifdef CONFIG_MMU

	# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
	# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
	# define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)

	# else /* CONFIG_MMU */
	# define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
	# define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
	# define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
	# define page_to_bus(page) (page_to_phys(page))
	# define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
	# endif /* CONFIG_MMU */

	# ifndef CONFIG_MMU
	# define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \
	((pfn) <= (min_low_pfn + max_mapnr)))
	# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
	# else /* CONFIG_MMU */
	# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
	# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
	# endif /* CONFIG_MMU */

	# endif /* __ASSEMBLY__ */

	#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))

	# define __pa(x) __virt_to_phys((unsigned long)(x))
	# define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))

	/* Convert between virtual and physical address for MMU. */
	/* Handle MicroBlaze processor with virtual memory. */
	#ifndef CONFIG_MMU
	#define __virt_to_phys(addr) addr
	#define __phys_to_virt(addr) addr
	#define tophys(rd, rs) addik rd, rs, 0
	#define tovirt(rd, rs) addik rd, rs, 0
	#else
	#define __virt_to_phys(addr) \
	((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
	#define __phys_to_virt(addr) \
	((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
	#define tophys(rd, rs) \
	addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
	#define tovirt(rd, rs) \
	addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
	#endif /* CONFIG_MMU */

	#define TOPHYS(addr) __virt_to_phys(addr)

	#ifdef CONFIG_MMU

	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	#endif /* CONFIG_MMU */

	#endif /* __KERNEL__ */

	#include <asm-generic/memory_model.h>
	#include <asm-generic/getorder.h>

	#endif /* _ASM_MICROBLAZE_PAGE_H */